1 /*
2 * Copyright (c) 2008, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package javax.swing.colorchooser;
27
28 import java.awt.event.FocusEvent;
29 import java.awt.event.FocusListener;
30 import java.text.ParseException;
31 import static java.util.Locale.ENGLISH;
32 import javax.swing.JFormattedTextField;
33 import javax.swing.JFormattedTextField.AbstractFormatter;
34 import javax.swing.SwingConstants;
35 import javax.swing.SwingUtilities;
36 import javax.swing.text.AttributeSet;
37 import javax.swing.text.BadLocationException;
38 import javax.swing.text.DefaultFormatterFactory;
39 import javax.swing.text.DocumentFilter;
40
41 @SuppressWarnings("serial") // Same-version serialization only
42 final class ValueFormatter extends AbstractFormatter implements FocusListener, Runnable {
43
44 static void init(int length, boolean hex, JFormattedTextField text) {
45 ValueFormatter formatter = new ValueFormatter(length, hex);
46 text.setColumns(length);
47 text.setFormatterFactory(new DefaultFormatterFactory(formatter));
48 text.setHorizontalAlignment(SwingConstants.RIGHT);
49 text.setMinimumSize(text.getPreferredSize());
50 text.addFocusListener(formatter);
51 }
52
53 private final DocumentFilter filter = new DocumentFilter() {
54 @Override
55 public void remove(FilterBypass fb, int offset, int length) throws BadLocationException {
56 if (isValid(fb.getDocument().getLength() - length)) {
57 fb.remove(offset, length);
58 }
59 }
60
61 @Override
62 public void replace(FilterBypass fb, int offset, int length, String text, AttributeSet set) throws BadLocationException {
63 if (isValid(fb.getDocument().getLength() + text.length() - length) && isValid(text)) {
64 fb.replace(offset, length, text.toUpperCase(ENGLISH), set);
65 }
66 }
67
68 @Override
69 public void insertString(FilterBypass fb, int offset, String text, AttributeSet set) throws BadLocationException {
70 if (isValid(fb.getDocument().getLength() + text.length()) && isValid(text)) {
71 fb.insertString(offset, text.toUpperCase(ENGLISH), set);
72 }
73 }
74 };
75
76 private final int length;
77 private final int radix;
78
79 private JFormattedTextField text;
80
81 ValueFormatter(int length, boolean hex) {
82 this.length = length;
83 this.radix = hex ? 16 : 10;
84 }
85
86 @Override
87 public Object stringToValue(String text) throws ParseException {
88 try {
89 return Integer.valueOf(text, this.radix);
90 }
91 catch (NumberFormatException nfe) {
92 ParseException pe = new ParseException("illegal format", 0);
93 pe.initCause(nfe);
94 throw pe;
95 }
96 }
97
98 @Override
99 public String valueToString(Object object) throws ParseException {
100 if (object instanceof Integer) {
101 if (this.radix == 10) {
102 return object.toString();
103 }
104 int value = (Integer) object;
105 int index = this.length;
106 char[] array = new char[index];
107 while (0 < index--) {
108 array[index] = Character.forDigit(value & 0x0F, this.radix);
109 value >>= 4;
110 }
111 return new String(array).toUpperCase(ENGLISH);
112 }
113 throw new ParseException("illegal object", 0);
114 }
115
116 @Override
117 protected DocumentFilter getDocumentFilter() {
118 return this.filter;
119 }
120
121 public void focusGained(FocusEvent event) {
122 Object source = event.getSource();
123 if (source instanceof JFormattedTextField) {
124 this.text = (JFormattedTextField) source;
125 SwingUtilities.invokeLater(this);
126 }
127 }
128
129 public void focusLost(FocusEvent event) {
130 }
131
132 public void run() {
133 if (this.text != null) {
134 this.text.selectAll();
135 }
136 }
137
138 private boolean isValid(int length) {
139 return (0 <= length) && (length <= this.length);
140 }
141
142 private boolean isValid(String text) {
143 int length = text.length();
144 for (int i = 0; i < length; i++) {
145 char ch = text.charAt(i);
146 if (Character.digit(ch, this.radix) < 0) {
147 return false;
148 }
149 }
150 return true;
151 }
152 }